https://phys.org/news/2019-03-zuckerberg-privacy-friendly-facebook.html

It's a major bet by Zuckerberg, who sees it as a way to push Facebook more firmly into a messaging market that's growing faster than its main social networking business. It might also help Facebook ward off government regulators, although the Facebook CEO made clear that he expects the company's messaging business to complement, not replace, its core businesses.

But there are plenty of obstacles. Facebook has weathered more than two years of turbulence for repeated privacy lapses, spreading disinformation, allowing Russian agents to conduct targeted propaganda campaigns and a rising tide of hate speech and abuse. Zuckerberg submitted to two days of grilling on Capitol Hill last April. All that increases the challenge of convincing users that Facebook really means it about privacy this time.